研究目的
To investigate the effects of various additives on the photovoltaic performance and stability of non-fullerene organic solar cells fabricated by blade-coating in ambient environment.
研究成果
The study demonstrates that the addition of ODT to PBDB-T:ITIC blends significantly improves both the photovoltaic performance and stability of blade-coated organic solar cells. The optimized ODT-based devices achieve a high PCE of 10.20% and exhibit better stability compared to devices with DIO or CN additives. Furthermore, large-area devices fabricated using ODT additive show promising performance, indicating the potential for scalable production of efficient and stable OSCs.
研究不足
The study focuses on a specific donor-acceptor system (PBDB-T:ITIC) and a limited set of additives (DIO, ODT, CN). The scalability of the blade-coating process to industrial production levels was not fully explored.
1：Experimental Design and Method Selection:
Non-fullerene OSCs with various additives (DIO, ODT, CN) were fabricated by blade-coating in ambient environment. The effects of additives on morphology and photovoltaic performance were investigated.
2：Sample Selection and Data Sources:
PBDB-T and ITIC were selected as the donor and acceptor materials, respectively. The devices were characterized using current density-voltage (J-V) characteristics, external quantum efficiency (EQE) measurements, grazing incidence wide-angle X-ray scattering (GIWAXS), resonant soft X-ray scattering (RSoXS), and atomic force microscopy (AFM).
3：List of Experimental Equipment and Materials:
Blade-coating setup, GIWAXS, RSoXS, AFM, and other standard laboratory equipment for OSC fabrication and characterization.
4：Experimental Procedures and Operational Workflow:
The active layers were prepared by blade-coating PBDB-T:ITIC solutions with or without additives. The devices were then characterized for their photovoltaic performance and stability.
5：Data Analysis Methods:
The photovoltaic parameters were extracted from J-V curves. The morphology of the active layers was analyzed using GIWAXS, RSoXS, and AFM. The charge carrier dynamics were investigated using space charge limited current (SCLC) model and light intensity dependent measurements.
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